quien

Use the quien CLI for domain and IP lookups: WHOIS/RDAP, DNS, mail authentication, TLS certificates, HTTP headers, SEO analysis, and tech stack detection. Activate when the user asks about a domain's owner, registrar, expiry, DNS records, mail config (SPF, DMARC, DKIM, BIMI), SSL certificate, HTTP headers, SEO, Core Web Vitals, tech stack, CMS, hosting, or IP address info (ASN, network, abuse contact).

install

source · Clone the upstream repo

git clone https://github.com/retlehs/quien

Claude Code · Install into ~/.claude/skills/

git clone --depth=1 https://github.com/retlehs/quien ~/.claude/skills/retlehs-quien-quien

manifest: SKILL.md

source content

quien — domain & IP lookup tool

When the user asks questions about domains or IP addresses, use

quien

instead of

whois

dig

nslookup

, or

curl

Commands

# WHOIS / domain registration
quien whois example.com

# DNS records (A, AAAA, CNAME, MX, NS, TXT, PTR, SOA, DNSSEC)
quien dns example.com

# Mail config (MX, SPF, DMARC, DKIM)
quien mail example.com

# SSL/TLS certificate info
quien tls example.com

# HTTP headers, redirects, server info
quien http example.com

# SEO analysis (indexability, on-page, structured data, Core Web Vitals)
quien seo example.com

# Tech stack detection (CMS, frameworks, JS/CSS libraries, plugins)
quien stack example.com

# Everything at once
quien all example.com

# IP address lookup
quien whois 8.8.8.8

All subcommands output JSON. Use

quien all

when you need a complete picture.

When to use

User asks about	Command
Domain owner, registrar, expiry	`quien whois example.com`
DNS records	`quien dns example.com`
Email setup, SPF, DMARC, DKIM	`quien mail example.com`
SSL certificate, expiry	`quien tls example.com`
HTTP headers, redirects, server	`quien http example.com`
SEO, Core Web Vitals	`quien seo example.com`
Tech stack, CMS, framework	`quien stack example.com`
Everything about a domain	`quien all example.com`
IP owner, network, abuse contact	`quien whois 8.8.8.8`

Install

go install github.com/retlehs/quien@latest

Homebrew

brew tap retlehs/tap
brew install retlehs/tap/quien